CN116592528A - Refrigerating device - Google Patents

Abstract

The invention relates to the technical field of household appliances, in particular to a refrigerating device, which aims to solve the problems that the hot fluoride frost of the existing refrigerating device is usually directly defrosted by using the exhaust gas of a compressor, but the defrosting cannot be quickly performed due to the low exhaust gas temperature. For this purpose, the refrigerating device of the invention comprises a compressor and an evaporator, a first pipeline is arranged between the inlet of the evaporator and the outlet of the compressor, a heat exchanger is arranged on the first pipeline, the heat exchanger is arranged to enable the refrigerant flowing from the outlet of the evaporator to the inlet of the compressor to exchange heat with the refrigerant flowing from the outlet of the compressor to the inlet of the evaporator at the heat exchanger, so that the refrigerant flows to the inlet of the compressor after being heated by the refrigerant flowing from the outlet of the compressor to the inlet of the evaporator, the temperature of the refrigerant flowing to the inlet of the compressor is increased, the exhaust temperature of the compressor is increased, and defrosting can be performed more quickly.

Description

Refrigerating device

Technical Field

The invention relates to the technical field of household appliances, and particularly provides a refrigerating device.

Background

Because the refrigeration system of the refrigeration device runs for a long time, a frost layer can be formed on the evaporator along with the entering of air in the box in the using process of the device, and therefore defrosting is required.

The existing defrosting mode mainly comprises two modes, namely, one is thermal defrosting mode and the other is electric heating wire defrosting mode, the existing thermal defrosting mode is used for defrosting by directly using exhaust gas of a compressor, but the defrosting cannot be performed quickly due to the fact that the exhaust gas temperature is not high enough, the electric energy consumption can be increased after long-time defrosting, the electric heating wire defrosting mode has the problems of inflammable and explosive safety risks, high power consumption, high maintenance difficulty of the electric heating wire, difficulty in operation and the like.

Accordingly, there is a need in the art to provide a new refrigeration device that addresses the above-described problems.

Disclosure of Invention

The invention aims to solve the technical problems that the hot fluoride frost of the existing refrigeration device is usually directly defrosted by the exhaust gas of a compressor, but the defrosting cannot be performed quickly due to the low exhaust gas temperature.

In a first aspect, the invention provides a refrigeration apparatus comprising a compressor and an evaporator, a first conduit being provided between an inlet of the evaporator and an outlet of the compressor, a heat exchanger being provided on the first conduit, the heat exchanger being arranged such that refrigerant flowing from the outlet of the evaporator to the inlet of the compressor is able to exchange heat at the heat exchanger with refrigerant flowing from the outlet of the compressor to the inlet of the evaporator.

In a specific embodiment of the above refrigeration device, a second pipeline is arranged between the outlet of the evaporator and the inlet of the compressor, and the refrigerant from the outlet of the evaporator can flow along the second pipeline and enter the compressor after passing through the heat exchanger.

In a specific embodiment of the foregoing refrigeration apparatus, the refrigeration apparatus further includes a condenser, a third pipeline is disposed between the outlet of the compressor and the inlet of the condenser, and a first valve is disposed at a crossing of the first pipeline and the third pipeline, so that the outlet of the compressor can be selectively connected to the inlet of the evaporator or the inlet of the condenser.

In a specific embodiment of the above refrigeration device, the first valve is disposed between the heat exchanger and the inlet of the evaporator; alternatively, the first valve is disposed between the outlet of the compressor and the heat exchanger.

In a specific embodiment of the foregoing refrigeration apparatus, a fourth pipeline is further disposed between the outlet of the evaporator and the inlet of the compressor, and a second valve is disposed at the intersection of the fourth pipeline and the second pipeline, so that the outlet of the evaporator may be directly connected to the inlet of the compressor, or may be connected to the inlet of the compressor after passing through the heat exchanger.

In a specific embodiment of the above refrigeration device, a fifth pipeline is disposed between the outlet of the condenser and the inlet of the evaporator, and a throttling device is disposed on the fifth pipeline.

In a specific embodiment of the above refrigeration device, an evaporating fan is disposed at the evaporator, and/or a condensing fan is disposed at the condenser.

In a specific embodiment of the above refrigeration device, the first valve is a three-way reversing valve, and/or the second valve is a three-way reversing valve.

In a specific embodiment of the above refrigeration device, the heat exchanger is any one of a double pipe heat exchanger, a spiral wound heat exchanger, and a parallel brazed heat exchanger.

In a specific embodiment of the above refrigeration device, the heat exchanger is fixed on the bottom plate of the compressor in a flat manner.

In the above-mentioned technical solution, the present invention can raise the discharge temperature of the compressor, specifically, since the temperature of the refrigerant after being compressed by the compressor is raised, and the discharge temperature is higher as the return air temperature of the vapor compression refrigeration system is raised (the return air temperature is raised by about 1 ℃ each time, the discharge air temperature is raised by about 1.3 ℃), in this embodiment, a heat exchanger is provided between the outlet of the compressor and the inlet of the evaporator, and the refrigerant flowing from the outlet of the evaporator to the inlet of the compressor and the refrigerant flowing from the outlet of the compressor to the inlet of the evaporator are subjected to heat exchange in the heat exchanger, so that the refrigerant flowing from the outlet of the compressor to the inlet of the evaporator is heated by the refrigerant having a higher temperature and flowing from the outlet of the evaporator to the inlet of the compressor, thereby raising the temperature of the refrigerant entering the compressor, that is, the return air temperature, and further obtaining a higher discharge temperature and obtaining a better frosting effect.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a refrigerant flow path of a defrost mode of an air conditioner according to the present invention;

fig. 2 is a refrigerant flow path of the cooling mode of the air conditioner of the present invention.

List of reference numerals:

1-an air conditioner;

11-a compressor;

12-an evaporator; 121-an evaporation fan;

13-a first line; 131-a heat exchanger; 132-a first valve;

14-a second pipeline; 141-a second valve;

15-a condenser; 151-a condensing fan;

16-a third line;

17-fourth pipeline;

18-a fifth line; 181-throttle device.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can adapt it as desired to suit a particular application. For example, although described in the specification as a double pipe heat exchanger, it is apparent that the present invention may employ other various forms of heat exchangers, such as a spiral wound heat exchanger, a parallel brazed heat exchanger, etc., as long as the heat exchanger is capable of heat exchanging refrigerant flowing from an outlet of an evaporator to an inlet of a compressor with refrigerant flowing from an outlet of the compressor to an inlet of the evaporator at the heat exchanger. In addition, although the air conditioner is described as an example in the specific embodiment of the present invention, it is obvious that the refrigerating apparatus of the present invention may be other refrigerating apparatuses, such as a refrigerator, as long as it has a problem that frost is formed on the surface of the evaporator during the refrigerating process.

It should be noted that, in the description of the present invention, terms such as "left", "right", and the like, refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," second, "" third, "" fourth, "and fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

First, a process of thermally fluorinating frost of an existing air conditioner will be described.

The existing air conditioner mainly adopts two defrosting modes, namely hot fluorinated defrosting mode and electric heating wire defrosting mode, because the temperature of a refrigerant is increased after the refrigerant is compressed by a compressor, the existing hot fluorinated defrosting mode is usually to defrost by directly using the exhaust gas of the compressor, but because the temperature of the exhaust gas is not high enough, rapid defrosting cannot be performed, the consumption of electric energy can be increased after long-time defrosting, the electric heating wire defrosting mode has the problems of inflammable and explosive safety risk, high power consumption, high maintenance difficulty of the electric heating wire, difficult operation and the like, so that the invention provides the following scheme for realizing rapid defrosting and reducing the consumption of electric energy.

In order to solve the problem that the hot frost of the existing air conditioner 1 is usually directly removed by using the exhaust gas of the compressor 11, but the rapid defrosting cannot be performed due to the low exhaust gas temperature, as shown in fig. 1 (the arrow direction in the drawing is the flow direction of the refrigerant), the air conditioner 1 of the present invention comprises a compressor 11 and an evaporator 12, a first pipeline 13 is arranged between the inlet of the evaporator 12 and the outlet of the compressor 11, a heat exchanger 131 is arranged on the first pipeline 13, the heat exchanger 131 is a double pipe heat exchanger 131, a first valve 132 is arranged between the double pipe heat exchanger 131 and the inlet of the evaporator 12, a second pipeline 14 is arranged between the outlet of the evaporator 12 and the inlet of the compressor 11, a second valve 141 is arranged on the second pipeline 14, the first valve 132 and the second valve 141 are all three-way reversing valves, the refrigerant from the outlet of the evaporator 12 can flow along the second pipeline 14, and after passing through the heat exchanger 131, enter the compressor 11, the heat exchanger 131 is arranged so that the refrigerant flowing from the outlet of the evaporator 12 to the inlet of the compressor 11 can flow to the heat exchanger 11 at the inlet of the heat exchanger 131 and the heat exchanger 11.

In the case of adopting the above-described embodiment, in the process of performing thermal defrosting by the air conditioner 1 of the present invention, the refrigerant flows out of the compressor 11 and is compressed into a gaseous state of high temperature and high pressure, the gaseous refrigerant of high temperature and high pressure passes through the inner tube of the heat exchanger 131, the gaseous refrigerant of high temperature and high pressure after passing through the heat exchanger 131 flows to the first valve 132 along the first pipe 13, at this time the three-way reversing valve first valve 132 is conducted in the direction of the evaporator 12, the gaseous refrigerant of high temperature and high pressure continues to flow to the inlet of the evaporator 12 along the first pipe 13 and flows into the evaporator 12 from the inlet of the evaporator 12, the gaseous refrigerant is evaporated and released in the evaporator 12 so as to melt the frost layer on the evaporator 12, the gaseous refrigerant becomes a low temperature refrigerant, the low temperature refrigerant flows out of the outlet of the evaporator 12 along the second pipe 14 to the second valve 141, at this time the three-way reversing valve second valve 141 is conducted in the direction of the heat exchanger, that the refrigerant can continue to flow to the right side of the second valve 141 in the figure, the second pipe 131 is continuously conducted in the direction of the second pipe 131, the left side of the heat exchanger 11 and then flows out of the heat exchanger 131 from the inner pipe 11 to the heat exchanger 11, the left side of the heat exchanger 131 from the heat exchanger 11 and then flows out of the heat exchanger 11 to the heat exchanger 11 from the heat exchanger 11 to the heat exchanger, the heat exchanger 131 from the left side of the heat exchanger 11 and then flows out of the heat exchanger 11 to the heat exchanger 11, the heat exchanger 11 and then flows out of the heat exchanger 11 from the heat exchanger 11 to the heat exchanger, the heat exchanger 131 from the heat exchanger 11, the heat exchanger 11 and then flows out of the heat exchanger 11, the heat exchanger 131 from the heat exchanger 11, and then the heat exchanger has been compressed between the heat exchanger and the heat exchanger has been compressed and the heat exchanger has been cooled from the heat exchanger 11, in the heat and the heat exchanger has been cooled heat and the heat and heat exchanger has been cooled from the heat pump heat was cooled, and flows out from the right end of the double pipe heat exchanger 131, flows through the first valve 132 and then flows to the inlet of the evaporator 12 along the first pipeline 13 to perform thermal frosting, and the temperature of the refrigerant compressed by the compressor 11 is further increased because the refrigerant entering the compressor 11 at the moment is the refrigerant after temperature rising, so that the temperature of the refrigerant flowing from the inner pipe of the double pipe heat exchanger 131 to the inlet of the evaporator 12 along the first pipeline 13 after passing through the first valve 132 is further increased.

The advantages of the above embodiment are: since the temperature of the refrigerant is increased after being compressed by the compressor 11, and the higher the return air temperature of the vapor compression refrigeration system is, the higher the return air temperature is (the higher the return air temperature is by about 1 deg.c, the higher the exhaust air temperature is by about 1.3 deg.c), therefore, in this embodiment, the heat exchanger 131 is provided between the outlet of the compressor 11 and the inlet of the evaporator 12, and the refrigerant flowing from the outlet of the evaporator 12 to the inlet of the compressor 11 is heat-exchanged with the refrigerant flowing from the outlet of the compressor 11 to the inlet of the evaporator 12 at the heat exchanger 131, so that the refrigerant flowing from the outlet of the compressor 11 to the inlet of the evaporator 12 is heated, thereby increasing the temperature of the refrigerant entering the compressor 11, that is, the return air temperature, and the compressor 11 can obtain a higher exhaust air temperature, and a part of the higher exhaust air temperature brings more heat to raise the return air temperature, and a part of the refrigerant enters the evaporator 12 to be used for defrosting, and a part of the refrigerant can still be gasified with a lower heat than the heat of the evaporator 12 when the return air temperature is about 1 deg.c, and the temperature is about 1 deg.c higher than the inlet of the evaporator 12 is not required to be gasified, and the heat of the frost can be raised.

In addition, regarding the above-mentioned double pipe heat exchanger 131, the person skilled in the art can select the length, shape and forward and backward flow directions of the double pipe heat exchanger 131 according to the actual needs, for example, if the temperature of the return air of the compressor 11 needs to be further raised, the person skilled in the art can increase the contact time of the exhaust air of the compressor 11 with the return air by increasing the length of the double pipe heat exchanger 131, so that the heat of the exhaust air can be more obtained by the return air, in addition, the person skilled in the art can increase the contact area of the return air and the exhaust air by changing the ratio of the diameters of the inner pipe and the outer pipe of the double pipe heat exchanger 131 or by changing the shapes of the inner pipe and the outer pipe, so that the heat exchanging effect of the exhaust air on the return air can be improved, and in addition, the person skilled in the art can also set the position of the return air inlet on the double pipe heat exchanger 131 on the right side of the double pipe heat exchanger 131, and the return air outlet on the left side of the double pipe heat exchanger 131, in addition, in respect to the return air and exhaust air, although the above-mentioned inner pipe and the exhaust air pass between the inner pipe and the outer pipe, the exhaust air pass through between the inner pipe and the invention is not the only through the inside, but the invention can also pass through the invention and the invention can be easily and the invention.

In addition, regarding the first valve 132 and the second valve 141, although the first valve 132 and the second valve 141 are mentioned as three-way reversing valves, this is not a limitation on the types of the first valve 132 and the second valve 141 of the present invention, and those skilled in the art may select other types of the first valve 132 and the second valve 141, for example, one or both of the first valve 132 and the second valve 141 may be selected as four-way reversing valves, so long as they are common reversing valves and can function to selectively connect the first pipe 13 and the third pipe 16, the second pipe 14 and the fourth pipe 17, and these simple modifications are all within the scope of the present invention.

In addition, in a possible embodiment, the first valve 132 may be disposed between the outlet of the compressor 11 and the heat exchanger 131, and these changes do not exceed the technical principles of the present invention, and thus are included in the scope of the present invention.

Having described the primary embodiment of the invention (i.e., the process of thermally fluorinating frost), a few preferred embodiments of the invention are described.

As shown in fig. 2 (the arrow direction in the drawing is the flow direction of the refrigerant), describing the refrigeration process of the air conditioner 1 according to the present invention, in one possible embodiment, the air conditioner 1 further includes a condenser 15, a third pipeline 16 is disposed between the outlet of the compressor 11 and the inlet of the condenser 15, a first valve 132 is disposed at the intersection of the first pipeline 13 and the third pipeline 16, so that the outlet of the compressor 11 can be selectively connected to the inlet of the evaporator 12 or the inlet of the condenser 15, the first valve 132 is disposed between the heat exchanger 131 and the inlet of the evaporator 12, a fourth pipeline 17 is disposed between the outlet of the evaporator 12 and the inlet of the compressor 11, a second valve 141 is disposed at the intersection of the fourth pipeline 17 and the second pipeline 14, so that the outlet of the evaporator 12 can be directly connected to the inlet of the compressor 11, or after passing through the heat exchanger 131, the outlet of the condenser 15 and the inlet of the evaporator 12 are disposed with a fifth pipeline 18, and a throttling device 181 is disposed on the fifth pipeline 18.

In the case of adopting the above embodiment, in the refrigeration process of the air conditioner 1 of the present invention, the refrigerant flows out from the outlet of the compressor 11 and flows to the first valve 132, at this time, the first valve 132 is conducted to the third pipe 16, the high-temperature and high-pressure gaseous refrigerant flowing out from the compressor 11 flows through the first valve 132 along the third pipe 16 and flows to the inlet of the condenser 15, the high-temperature and high-pressure gaseous refrigerant is converted into the low-temperature and high-pressure liquid refrigerant after condensing through the condenser 15, the low-temperature and high-pressure liquid refrigerant flows out from the outlet of the condenser 15 along the fifth pipe 18 toward the inlet of the evaporator 12, and because the throttling device 181 is provided on the fifth pipe 18, the low-temperature and high-pressure liquid refrigerant is throttled to the low-pressure and low-temperature liquid refrigerant after passing through the throttling device 181, and then continues to flow along the fifth pipe 18 toward the inlet of the evaporator 12, and is subjected to phase change and absorb heat in the evaporator 12 to the gas state, at this time, the second valve 141 is conducted to the fourth pipe 17, and the gaseous refrigerant flows into the evaporator 11 along the fifth pipe 17 after passing through the second valve 141, thereby completing the refrigeration process.

As shown in fig. 1 and 2, in one possible embodiment, the evaporator 12 is provided with an evaporation fan 121, and the condenser 15 is provided with a condensation fan 151, so that the evaporation fan 121 and the condensation fan 151 can accelerate the air flow at the evaporator 12 and the condenser 15, thereby improving the evaporation efficiency of the evaporator 12 and the condensation efficiency of the condenser 15.

In one possible embodiment, the heat exchanger 131 may be mounted flat on the bottom plate of the compressor 11, so that the heat exchanger 131 is mounted without affecting the ventilation of the air conditioner 1.

In summary, the air conditioner 1 of the present invention increases the temperature of the coolant entering the compressor 11 by providing the heat exchanger 131 on the first pipe 13 between the outlet of the compressor 11 and the inlet of the evaporator 12 and by heating the low-temperature coolant flowing from the outlet of the evaporator 12 into the inlet of the compressor 11 in the heat exchanger 131 with the high-temperature coolant flowing from the outlet of the compressor 11, and at the same time, since the temperature of the return air is increased by about 1.3 ℃ per 1 ℃, the temperature of the exhaust air is increased, the temperature of the gas entering the evaporator 12 is still higher than that without the heat exchanger 131 even though the exhaust air is subjected to heat exchange with the return air, thereby providing more heat, playing a role of shortening defrosting time, improving hot air defrosting efficiency for low-ambient temperature conditions, and in addition, switching of hot air defrosting and refrigerating processes is achieved by providing the first valve 132 and the second valve 141 two three-way reversing valves.

It should be noted that the above-mentioned embodiments are merely for illustrating the principles of the present invention, and are not intended to limit the scope of the invention, and those skilled in the art can modify the above-mentioned structure to apply the present invention to more specific application scenarios without departing from the principles of the present invention.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (10)

1. A refrigeration device comprising a compressor and an evaporator, a first conduit being provided between an inlet of the evaporator and an outlet of the compressor, a heat exchanger being provided on the first conduit, the heat exchanger being arranged such that refrigerant flowing from the outlet of the evaporator to the inlet of the compressor is able to exchange heat at the heat exchanger with refrigerant flowing from the outlet of the compressor to the inlet of the evaporator.

2. A refrigeration unit as recited in claim 1 wherein a second line is provided between said evaporator outlet and said compressor inlet, refrigerant from said evaporator outlet being capable of passing along said second line and through said heat exchanger into said compressor.

3. The refrigeration unit as recited in claim 2 further comprising a condenser, a third line being disposed between the outlet of the compressor and the inlet of the condenser, a first valve being disposed at the intersection of the first line and the third line to enable the outlet of the compressor to be selectively connected to the inlet of the evaporator or the inlet of the condenser.

4. A refrigeration unit as recited in claim 3 wherein said first valve is disposed between said heat exchanger and an inlet of said evaporator; alternatively, the first valve is disposed between the outlet of the compressor and the heat exchanger.

5. A refrigeration unit as recited in claim 3 wherein a fourth line is further provided between the outlet of said evaporator and the inlet of said compressor, and a second valve is provided at the intersection of said fourth line and said second line to allow the outlet of said evaporator to be connected directly to the inlet of said compressor or to the inlet of said compressor after passing through said heat exchanger.

6. The refrigeration unit as recited in claim 5 wherein a fifth line is provided between the outlet of the condenser and the inlet of the evaporator, said fifth line having a throttling device disposed thereon.

7. A refrigerating apparatus as recited in claim 3, wherein an evaporating fan is provided at the evaporator, and/or,

and a condensing fan is arranged at the condenser.

8. A refrigeration unit as recited in claim 5 wherein said first valve is a three-way reversing valve, and/or,

the second valve is a three-way reversing valve.

9. The refrigeration unit of claim 1, wherein the heat exchanger is any one of a double pipe heat exchanger, a spiral wound heat exchanger, and a parallel brazed heat exchanger.

10. The refrigeration unit of claim 1 wherein said heat exchanger is mounted flat to a base plate of said compressor.